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Posts posted by VigdisVZ
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Tried a buddys timer remote today at the astronomy club meeting. Worked like a charm. Convinced him to loan it to me, might even give him money to order a new for himself, and keep this one
. Also ordered a coma corrector today.
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At what FL can you fit both M31 and M33?
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Not sure if this has been linked yet, but pretty good.
http://www.ted.com/talks/jim_holt_why_does_the_universe_exist
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Like has been mentioned before, a dobsonian, while a bit bulky, gives the most bang for the buck. However, the cheaper versions dont have a motor that tracks the sky, but getting used to nudging the telescope along takes a few hours and then it becomes second nature. They are a bit bulky like FunkyKoval35 mentions, but don't let that put you off if your husband is reasonably fit, the 150p isn't a problem to lug to and from the car if you dont have a back garden.
Worth mentioning with a dobsonian reflector like the 150p mentioned above is that you may want a collimation cap like this one http://www.firstlightoptics.com/other-collimation-tools/cheshire-collimating-eyepiece.html in order to keep the mirrors aligned.
Also I can recommend this book as an excellent companion to the scope. http://www.amazon.com/Turn-Left-Orion-Hundreds-Telescope/dp/0521153972
Best of luck and please come back with any questions you might have, and send your husband here when he starts scratching his head.
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What software did you use?
Photoshop CS6 (benefits of company licenses) but can be just as easily done in GIMP for free.
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Good work!
At this point I would probably google for "diy phone holder telescope". There are some contraptions you can make easily.
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I really like it. These widefields of familiar objects give you a whole new sense of context.
At some point you should take darks, flats and bias. Especially flats would really help you in processing. And nitpicking, a bit more color in the stars would have been nice.
What ISO?
Thanks for sharing.
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Best of luck!
SCT's seem to dominate higher focal length. Newts kinda take the midfield.
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Thank you.
Oh and one more thing, can you increase the magnification if you have a DSLR attached onto a scope (not using the DSLR's zoom) if you cant, what magnification will the overall set up be magnified at?
No, you shoot at prime focus ie no magnification. Just the scope. It "magnifies" just as a camera lens would at the same focal length. In this case 750mm.
You can in theory attatch an eyepiece in between with an eyepiece projection adapter, but the focuser on a 150PDS lacks inwards travel to reach focus.
If you're curious as to how big certain DSO will look with a specific camera/scope combo, have a look here...
And remember that a bigger higher focal length scope isnt always better, it depends on what you want to image. I chose the 150pds for its comparatively low focal length, allowing me to fit all the big popular DSO like M31, M33, M42, M45 within the FOV. If you want to go for pure planetary like Jupiter and Saturn, you want something else. And some people who like to image wide field emission nebulae go with smaller aperture lower focal length refractors that have superior optic quality.
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"What Could Possibly Go Wrong?"
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There is more to F-number than meets the eye. Just something to have in the back of your mind.
Well, I can recommend the 150PDS as a good allrounder. It provides roughly the same "power" (with 750mm fl) as a frac, but has a much larger light collection area for visual use. Not too bulky, cheap, and does an "ok" job visually... and remember you need a coma corrector unless you want fuzzy eggy stars in the corners. This also applies to the 200p.
Here are a few of my early examples with a 150PDS coupled with a DSLR (no guide, no coma corrector, 30sec subs), the processing is still off on these, but learning all takes a while
A HEQ-5 and a 150PDS is a pretty good starting combo once you know the limitations.
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Yep, thats still an "EQ-5". Not a "HEQ-5". Like Stuart says, you will not get consistent data with a mount like the EQ-5 and will have to work uphill, risking frustration and burning yourself out, and dropping the hobby.
+1 for the book Stuart mentions. FLO has it via the sponsor link at the top of the page.
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Hi
As you might already have guessed from reading posts here, there is no setup telescope that does everything.
The EQ-5 is a bit weak for AP (thought it will work, but you will probably consider upgrading it pretty soon).
The 200p is a good alrounder, but bulky on an underpowered mount when you start loading up with cameras and guidetubes. But it will work.
The Equinox is a very good scope for photography and will probably be a bit less suited for visual due to smaller aperture. But it will work.
So do you want a setup that does everything, but not super-good?
If your main use is AP, I would recommend getting atleast an HEQ-5 (better yet a NEQ-6 but I realise there is a price difference). I also think that the 150PDS hits the sweet spot between visual and easy of photography. However: Personally I've been thinking about getting a 200p or 250p for visual use on my NEQ-6 but everytime I come up with the only answer: Get a dob for visual, and get a smaller frac (not unlike the equinox) for AP.
Instead of trying to cut corners and fit everything into one scope, perhaps its better to get a setup thats really good for one thing? Instead of bad at both?
Besides, if you decide to get a secondary scope will keep you occupied during those long hours the AP setup minds its own business collecting data.
Also, I've heard lots of stories where people try to use a bulky reflector on an EQ-mount for visual and always end up with the focuser in an awkward position when going for different areas of the sky.
My recommendation would in the end be to hold your horses a bit, and think long and hard to what you want to really do, and get a kit that you wont grow out of quickly.
Also keep in mind that a scope that's good for capturing images of DSO, rarely does planetary very good.
To sum up, the equipment you've listed isnt bad by any means, but I think you do your wallet a favor by figuring out what really matters, and put all the eggs in that basket.
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If I was building a tank, I wouldn't settle for anything less than 60Ah lesiure battery. Even big jump starters like my 19Ah one will start to buckle after a while once you load up with laptops, CCD's, guiders, dew heaters etc.
You also shouldn't run it completely dry as this will damage it, iirc.
The question is, how portable do you want to be? I assume between the scope and mount, you already need to use a car...
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Hi
Use your weakest magnification eyepiece, and the core of M31 should be visible like a large fuzzy patch of sky.
Other DSO you might try is the Double Cluster in perseus, galaxies M81+82, Hercules Globular Cluster M13 to name a few.
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Thanks Patrik, I'm done with this particular image, but I might take you up on that for the next run. Not going to wear myself out over small amounts of data, but when I get better subs...
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Essentially you would need an automated observatory for this, otherwise it's too time consuming. Also checking the plates for possible moving objects comets isn't something that computers are very good at, yet.
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Looks like a good idea, but you sure you want to trust your phone to a company that also makes an app for stalking?
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That last one is very beautiful. Lots of details. Thanks for sharing.
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I'd say your PA was pretty good, that image is very sharp. You used the 200p on HEQ5?
You probably might want to tune back the processing a bit however, background is burned out, it's very sharp and some of the stars have gone green.
Keep em coming!
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Thanks Erik, not sure yet if I want to lug around a laptop to run PHD. But I guess that road is more future-proof than a Synguider/Nexguider. I'm also undecided if I want a comacorrector or get a new frac instead...
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As you might have seen I've already bounced this one a few times in the forum (and on swedish Astronet) to get some feedback. And I don't think I'll do anything further with it, so here is the official version!
Since I don't have a backyard obsy it's always a struggle quickly hit the road out to a darker site with my gear whenever there is a reasonable gap in the clouds. This time I also had to throw away half of the subs because focus crept off slightly mid sequence. In the end I got about 39x30sec subs at ISO800 (timer remote I bought last week was faulty),16 flats, 40 bias and 1 dark (I thought I took a sequence, but I took a single by mistake).
This is the first time sucessfully using T-shirt flats. There is a slight gradient left, but that could possibly be LP from the airport.
The yellow star color just jumped at me, but there wasn't really a hint of blue so I had to fiddle around to get the balance right, so color wise it might have slight hint of artistic freedom.
I've learned a ton reprocessing this image over and over, can't wait to get my hands on a coma corrector, guide solution, working timer remote and who knows, maybe an astromodded DSLR.
Thanks for looking.
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4 Hour Cass W.Field, the outcome..............
in Getting Started With Imaging
Posted
Any chance to see a stack? Data looks promising.